Telescopic elbow



May 30, 1933. Q J, ERNST 1,911,311

TELESCOPIC ELBOW Filed Oct. 11, 1930 INVENTOR femems r/oaegafi 112.57?

BYS Tm AT RNEY Patented May 30, 1933 PATENT OFFIEV CLEMENS JOSEPH ERNST,OF MINSTEB, OHIO TELESCOPIC ELBOW Application filed October 11, 1930.Serial No. 488,107.

The invention primarily has for its objcct to proi'ide a novel elbowconstruction for use in pipe line work or the like which is composed ofa plurality of sections telescopic one within another to enable varyingthe relative positions of the elbow ends and which are so interconnectedas to prevent over-extension. of the joint and to readily permit thedesired telescopic adjustments without danger of twist-locking orannning of the sections.

The invention further resides in the provision of novel means formechanically securing the telescopic adjustments of the elbow sections.

v\Vith these and other objects in view which will more fully appear, thenature of the invention will be more clearly understood by following thedescription, the ap- It] pended claims and the several views illustratedin the accompanying drawing.

In the drawing Figure 1 is a central longitudinal section illustratingthe elbow sections partially telefi scoped,

Figure 2 is a view similar to Figure 1 with the elbow sections fullyextended,

Figure 3 is a cross section taken on the line 33 on Figure 2,

Bi Figures 4. and 5 are detail side elevations of the respective elbowsections, and

Figure 6 is an enlarged detail longitudinal section of the elbow sectionmoving means.

Like reference numerals designate corresponding parts throughout theseveral figures of the drawing.

My improved elbow is preferably con structed of two arcuatc tubularsections 1 and 2, the latter being telescopically slidable in theformer. The free or discharge end of each section may be equipped with areinforcing ring or flange 3, said flanges being secured upon thesection ends in any approved manner. The arcs of the axes of thesections 1 and 2 are struck from a common center so that the sectionswill slide one within the other freely and without danger of wedging.

The section 2 is provided with a longitudinal groove 4 preferablyindented in the inner or small radius wall thereof and the section 1 isprovided with a tongue 5 indented in the telescoping end thereof inposition to enter and slide in the groove at of the section 2. Thistongue and groove equipment of the sections serves to prevent separationof the sections due to over-extension, as the end of the groove 4cooperates with the tongue in forming a stop preventing overextension,and also prevents twisting of one section relatively to the other suchas would cause twist-locking and jamming of the sections. By forming thetongue and groove devices in the nature of smooth indentations, theinterior of the elbow is kept free of obstructions which might tend tocollect foreign matter or prevent free passage of material through theelbow.

Each reinforcing flange 3 carries a bracket providing apertured ears 6and to one set of such bracket ears a sleeve 7 is pivotally connected asillustrated in Figures 1 and 2 of the drawing. A rod member 8 istelescopically slidable in the sleeve 7 and has its extended endpivotally connected to the bracket ears of the other reinforcing flange3. Thus as the sections 1 and 2 are telescoped inwardly to a morecompacted condition or outwardly to a more extended condition, thesleeve and: rod members 7 and 8 will likewise be moved relatively toeach other.

At its free end the sleeve 7 carries a lateral boss 9 which is providedwith a threaded aperture communicating with the interior of the sleeveand adapted to receive a clamp screw 10. It will be understood that theclamp screw isloosened when an member 8 as above described.

adjustment of the elbow is made and is again tightened atter theadjustment has been etlectell to clamp against the rod meniher 5, andthus secure the adjustment of the elbow. For his purpose the screw isprovided with a turning handle ll.

Altcr the elbow sections have been assembled the slot i oi. the section2 is preteralily forced to closed condition, that is, in contact withthe wall of the llange 3 as indicated at 1% to avoid the possibilitg ofleakage at this point.

It will also be observed that the major portions of the ears (5 lieWithin the periphe al confines of the carrying flanges 3 so as not toform obstructions such as would hinder coupling of the elhow sectionsWith other pipe sections where joints calling for partial insertion ofthe thing es 3 are employed.

The boss 9 is rovided with an enlarged recess 12 into which the clampingend of the s rew is projectiwl to engage the rod A pin 13 is projectedthronsrh this extended end of the screw within the enlarged recess andserves to perm t retraction of the screw sufticent to release the clam'iing engagement with the rod member 8 but serves to prevent retractionor removal of the screw so as to avoid the possibility of loss.

It is of course to be understood that the details of structure andarrangements of ants may be variously changed and modified withoutdeparting from the spirit and scone of 11W invention.

I claim '1. A pipe line elbow comprising a pinrality of telescopicsections, said sections having: liang e rings secured at their remoteextremities, bracket ears projecting from each flange ring at the innerside of the elbow and toward the remaining flange ring, and meanspivotallv connected to and extending between the ears to secure thesections at adjusted pcsitions, said ears having their major portionslying within the peripheral confines of the flanges for the purposespecified.

2. A pipe, line elbow comprising: a plu 'alit ot telescopic sheet metalsections, said sections l\:!\'iHfI thin 'e rings secured at their remoteextreiriities, bracket ears projr-icting from each flange ring towardthe remaining fiance ring. and means connected to and between the earsto secure the sections at adjusted positions, one of said sectionshaving' a tongue pressed in the tciescopcd end thereof and the other ofsaid sections having a groove pressed therein and terminating short ofthe ends thereof and adapted to cooperate with the tongue in limitingrelative movement of the sections.

3. A pipe line elbow including inner and

